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sept. 2, 1924. 1,507,307

W. A.. CHRYST IGNITION SYSTEM Filed Dec. 17. 1920 2 shun-Shan l am. 2 1924. www? W. A. CHRYST IGNITION SYSTEM Filed Dec. 17 1920 2 Sheets-Shut 2 j ell/23 ing description, reference being had to therammen aupa. z, ma.

UNITED. STATES PATENT yorlucr..

WILLIAI A. CHRIST, OF DAYTON, OHIO, ASSIGNOB TO' THE DAYTON ENGINEERING LABORATORIES COIPANY, OF DAYTON, OHIO, A CORPORATION 0F OHIO.

IGNITION SYSTEM.

To all whom it may concern.'

Be it known that I, WILLIAM A. CHRrsT, a citizen of the United States of America, residing at Dayton, county of Montgomery, State ot' Ohio, have invented certain new and useful Improvements in Ignition Systems, of which the following is a full, clear, and exact description.

This invention relates' to ignition systems for internal-combustion engines equipped with an electrically ignited fuel burner for auxiliary heating purposes and more particularly to en gines having a plurality of spark plugs in each cylinder. l

It is among the objects of the present in! vention toprovide ignition for the engine spark plugs and burner spark plug without requiring induction apparatus additional to that required for engine ignition, and without interfering with the engine ignition.`

Another object of the present invention is to simplify the distributing apparatus employed for distributing sparking impulses simultaneously to the plurality of spark lugs in each of the several engine cylinders 1n correct sequence.

Other and further objects othe present invention will be apparent .from the followaccompanying drawings, wherein a preferred embodiment ofthe present invention is clearly shown.

In the drawings: Fig. 1 is a wiring diagram showing the lcircuit connections between the various elements ofthe system;

Fig. 2 is a plan view of the ignition unit; Fig. 3 is a part sectional view taken along the line 3-3 of Fig. 2; and

Fig. 4 is a plan view of the rotor element of the ignition unit.

By referring to Figs. 2 and 3, the ignition unit is shown comprising a main body portion 20 provided with inwardly projecting` lugs 21 whichare adapted to support a plate v22. This plate in turn supports another plate 23 upon which are mounted the stationary contact standards of the circuit interrupters described in detail hereinafter.

A pair of oppositely disposed holding clips 24 are secured to the main body portion 20. in any suitable manner, these clips being adapted to engage with ears 25 formed on the head 26 which in turn is adapted to rest on the upper edge of the housing 20.

inner end of which is connected to a circulai` track 31. The function of these devices will be described hereinafter.

An engine drivenshaft 32 projects up-` wardly through the housing 20 and' plates 22 and 23, said shaft having the cam element 33 secured thereto in any suitable manner. The shaft 32 has a'reduced portion 34 above the cam 33 over which the rotor element 35 is adapted to lit and be driven there.-

by. This rotor element 35 comprises a main body portion 36 and an angularly arranged rib portion 37. In one end of this angularly arranged rib portion 37 there isa contact button 38. A spring element 39 'holds button 38 in electrical connection with a metal strip `40 which projects to thecenter portion of the rotor and is adaptedvto' be' engaged by the spring pressed contact 29 of the terminal 28. Another rotor button 41 is carried at the opposite end of the rib portion 37 and is pushed outwardly by a spring 42. This button is connected to an outwardly spring pressed brush 43, by means of a connector strip 44, said brush 43 in turn being adapted to engage the circular track 31 connected to the terminal 30 eccentrically arranged to the terminal 28. as has been mentioned heretofore. I

By referring to Fig. 1, the interruptor elements of the ignition unit are clearly shown. These interrupters include movable arms 50 and 51 fulcrumed'tqbut insulated from, the plate 23 at the one end, the other end carrying contacts 52 and 53 respectively.V These n'lovable arms 50 and '51 are provided with cam riding blocks .54 and 55 which, when the cum is-in operation; willtend to operate said arms causing the contact elements 52 and 53 to disengage with their respective stationary contacts56 and 57, respectively. As can be seen in the drawings, the cam ridingv block 55 is comparatively narrower than the cam riding block 54 for purposes which will be described in detail hereinafter. The

movable armsfi() and 51 are connected to the Y ignition unit terminals 58 and 59 by means ot vflat springs 60 andl 61, respectively, these '110 springs also functioning to hold said arms against the earn 15,

The operation of the system will now be set forth. As has been mentioned hcreinbe- .coils necessary for the. engine operation,`

without aiccting ythe eiieient operation of the same. As can seen in the drawings, and more particularly in Fig. 1, an engine 65 is provided, having cylinders 66 which are coil.

llpvided with sets-oie spark plugs 67 and 68.

esespark lugs of the various cylinders are connecte to their respective terminals 27 of the ignitionunit. When it is-desired to operate the engine, the switch 70 is closed,

ermitting current to How from the batteriy 1 to the point 72, thence the current.

branch through the lead 73, primary windings 74 of' ignltion coil 7 5, wire 76 to the terminal 58sprin`g 60, Contact varm 50, across the contacts 52 and 56 and back to the bat tery via the ground connections 80. From the point 72, current will also branch through the Wire 77, primary winding 78 of ignition coil 79, Wire 81, terminal '59, spring 61, Contact arm 51, across the contacts 5.3 and 57 and back tothe battery via the ground `connections 80. It is understood, of course, that to permit this fiow of curren't, the cam element 33 is in such a position, that the contacts 52 and 56, and 53 and 57, respeclively, will be closed. As soon as the cam 33 rotates to vo en the contacts, as is shown in Fig. 1, spar ing impulses will be inducedin the secondary winding 82 of ignition coil 75, which will be directed through the wire A83 to the terminal 30, circular track 31, brush 43, secured to the rotor 35, as'lhas been explained heretofore, connecting strip 44 to the rotor button 41, and thence to the va.- rious terminals 27|', alternates of which are connected to the set of spark plugs 67 of the engine c linders 66 as isvshown in the drawings'. T ie relative operation of the cam and the interrupter arm 50' to the rotor .distributor element contacting with the alternate terminals 27, connected. to the set of spark plugs 67 of theengine 65, will provide spark- 'ing impulses directly to these spark plugs.

' Interruption of the circuit through the,

primary winding 78 of the ignition lcoil 79 will cause s arling, impulses to be induced in the secon ary winding 84 ofsaid ignition Said impulses will then be directed via the wire 85 to the spark plug 8,6 ci the burner v 87 which, as has been mentioned'iifthe openintake marriold 88 of the engine 65.

the spark impulse .has jumped the'gap of thel ing paragraph of this application. is adapted to burn fuel and'act asnan auxiliary heater shown in thepresent drawings as heatin the ter spark plug 86, it will then be directed along Lafrance' the Wire 89 to the central terminal 28 of the distributor unit, thence to'the spring pressed Contact 29, connector strip 40, rotor button 3 8 tothe alternate terminals 27 which are connected to the set ot spark plugs-68 of the varlous cylinders 66 of engine 65.Y As can be clearly seen by this description 'the' spark plugs 68 are .in series connection with' the spark plug 86 of the burner 87 and if yno special arrangement would be provided the sparking impulses through these spark plugs 68 would be in terior to and less efficient than the sparking impulses provided at the spark plugs 67. In order to compensate 'for this without changing or affecting the induction engine ignition, the cam riding block 55 of the clrcuit interrupter, which' provides sparking impulses for both engine and lug ignition apparatus, to be closed or 'a' onger period than the other interrupter, thereby permitting the ignition lcoil 79 to apparatus used for providing the regular become energized to a greater degree than v the ignition coil 75 and thereby tend to'provide a spark of Jgreater intensity for' the A'set of spark plugs 68 thanthat furnished to the. of spark plugs 67. lt will, of course, be understood that with the burner spark plug 86 in series with the spark plugs 68, the final sparking impulses at the engine spark plugs 68 will be practically equal to that of the 'spark plugs 67, due to the energy consumed in furnishing a spark at the p As has been mentioned heretofore, the

alternate terminals 27 are connected, one set to the set of spark plugs v67, the other set to the set of spark plugs 68. This arrange ment of terminals in connection with anangularly arranged rotor, permits a single ignition unit or distributor unit to be used Where heretofore two units have been employed for distribution to two sets of spark plugs in engine cylinders. The rotor ele- 1 ment, as'is shown in Fig. 4, has one button displaced v30" from the central line of the other used, and arranged equidistant in a circular manner,v and mterrupters are employed which will cause simultaneous sparking imbutton, thus when 12 terminals are pulses at every 60 of the cam, the sparki ing ,impulses caused b v these interrupters may be concurrently directed to two different sparking devices, thus eliminating the rovidingw'tiiro 'Y separate and necessity of -for obtaining the distinct distri utor heads desired results. yAs is shown in Fig. 1, .each of the setsof contacts 52 and 56, and 53 and 57, are provided with condensers' 90 and 91, respectively, for Durposes well known in the art.

-While the form of mechanism herein' shown and described constitutes a preferred form of embodiment of the invention, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What I claim is as follows 1. In an ignition system, the combination with an engine having a plurality of sets of spark plugs and a fuel burner having a spark plug; of a current source; a plurality of ignition coils; means for distributing in recurrent sequence the impulses of one coil to a set of engine spark plugs and for concurrently distributin in recurrent sequence the impulses of anot er coil to another set of engine spark plligs and to the burner plu and timing mechanism for so controll ing the passa e of current to the coils that impulses of su antially equal intensity will bev delivered to the sets of en ine spark plugs, while the' burner .plug is ing provided with impulses.

2. In an ignition system, the combination with an engine including a c linder having a plurality of plu s, and aving a fuel burner provided wit a plug; of a plurality of ignition coils; a current source; means for connecting one coil with one of the engine plugs; means for connecting another coii with another engine plug and with the burner plug; and timing mechanism for so controllin the passage of current to the coils that impulses of substantially equal intensity will be delivered to the sets of engine spark plugs, while the burner plug is being provided with impulses.

3. In an ignition system, the combination with an engine having a plurality of sets of spark plugs; of a source of current; a plurality of ignition coils; engine operated interrupters for connectin the source of current to the ignition co' s for providing a plurality of sets of sparking impulses in recurrent sequence; a-unitary distributing Imeans for directing each set of sparking impulses to a respective set of engine spark plugs in recurrent sequence; a fuel burner; and a burner spark p ug connected between the distributing means and one of the igni-V tion coils whereby s arking impulses will be provided to both t e burner and one set of engine spark plugs concomitantly.

4. The combination with a multicylinder internal-combustion engine having spark plugs and a fuel burner having a spark plug, of ignition means connecting the fuel urner plug in series with a part only of the engine plugs; and including instrumentalities for producing sparking impulses of substantially the same intensity at all the engine spark lugs. y

5. The com ination with a multicylinder internal-combustion engine having spark plugs and aV fuel burner having a spark plug, of ignition means connecting the fuel burner plug in series with a part only of the engine plugs; and includin instrumentalities for producing spar ing impulses of substantially the same intensity at all the engine spark plugs, and a single distributor for distributing the sparking impulses in recurrent sequenceto the engine spark plugs.

In testimony whereof I hereto afiix my signature.

WILLIAM A. CHRYST.

lVitnesses:

H. E. SOLLENBERGER, InviN A. GnnENwALD. 

